That does sound delicious! Never seen powdered mustard, but I'm sure you could substitute for some regular English mustard. =]

Its the closest thing we have to English mustard.... Apparently.. according to my mum. Its a good way to use up beer that got opened the night before and didn't get drank! Yum,,,, I think I will make cheese toast now.

Of course then there is Marmite. I will add marmite to the cheese toast. Nothing divides the world like the like/dislike debate around marmite. *poke* Its like the mono vs. poly debate! Ha! not really